Stenciling machine



May 11 1926. 1,583,803

J. E. SHAVER, JR

STENCILING momma Original Filed May 1923 showing Patented May 11, 1926.

UNITED STATES JAMES E. SHAVER, 1a., or PHILADELPHIA, PENNSYLVANIA, Assreivon 'ro UNDER- WOOD TYPEWRITER COMPANY, OF NEW' YORK, Y.,

- WARE.

Original application filed May 26, 1923,

This invention relates to an automatic slop mechanism for controlling the movement of a revoluble stencil cylinder, the mechanism being particularly suitable for use in connection with the stencil cylinder of duplicating machines of the character disclosed in application, Serial No. 641,533, of 'which this application is a division.

The invention includes improved stop means by which the cylinder may be arrested at the end of each revolution, to facilitate the introduction and gaging of a new work sheet into the machine.

According to the invention the cylinder is provided with a pair of lugs adjustable along the rim of said cylinder, which cooperate with a detent mounted on the frame of the machine to cause the cylinder to stop at. the end of each'revolution, and to check the reverse movement thereof, so that the work sheets to be printed may be gag-ed and started through the machine in proper relation to the stencil sheet.

Heretofore fayielding stop on the handle bracket abutted against a fixed stop on the frame, to arrest the cylinder;'further pressure being required on the yielding stop to allow said stop to pass the abutment, when desirous of starting the cylinder on a new cvcle.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a longltud'nal section of a stencil machine embodying'the stop mechanism.

Figure 2 is a side elevation of the machine the location of the detent device with relation to the frame.

Figures 3, 4:, and 5 are views of the stop mechanism illustrating the different positions assumed during its operation.

Figure 6 is a detail view of the'handle and securing means therefor. I

In the embodiment shown, a base 1 is provided with end frames 2 and 3, the first of which carries a trunnion 4 upon one end of which a stencil cylinder 5 revolves, the other end of the cylinder being supported in the yoke-sha ed frame" 3 and revolving on trundle's 6,2, and 8 mounted in this frame.

The cylinder 5 is provided with an adjustable handle 9 having a base 10 in the STENCILING MACHINE.

Serial No. 641,533. Divided. and this application filed May 31, 1924. Serial No. 716,972. I

form of a casting including a pair of oppositely-disposed arms 11. These arms are perforated and screw threaded to receive A CORPORATION or DELA- suitable clamping screws 12 by meansnof which the handle is rigidly'secured to the revoluble cylinder 5. The base 10 is 'fur thermore provided with an offset portion 13, the outer edge being slightly turned up to form a lip 14 to engage-an annular groove 15 cut in the outer periphery of the cylinder 5. A pair of stop-lugs 16 and. 17

the function of which will be later described, are carried by the arms 11 and may'form an integral part thereof. A plate 18 secured to the base 10 has its free end curved'over to engage an annular groove 19 disposed interior-1y of the cylinder 5. Friction elements 20, inserted between the base of the handle and the side of the cylinder rim, receive pressure from the clamping screws '12, the

amount of pressure required being very slight to effect'a secure hold upon the cylinder.' The use of friction elements 20 reduces the strain upon the various parts of the securing means, as will be readily understood. 1

It will also be apparent that, upon releasing the pressure of the clamping screws 12, the handle 9 may be moved around the rim of the cylinder 5 to a new clamping position, so as to adjusttheirelationship of said handle with respect to. stop mechanism, which will now be described. V

The two lugs 16 and 17, carried by the arms 11 of the handle, co-operate with a detent 21 of the'general form of a bell-crank lever pivoted upon the frame 3 immediately under the cylinder 5,,to cause the movement of said cylinder to be arrested at the end of. each complete revolution for the introduction of a new work sheet. Upon considerationof Figure 3 it will be noted that the detent 21 includes a'pair of arms 22 and 23 disposed at an angle to each other, the arm 23 carrying a finger-piece 24. One end of a retractile spring25 is secured to the arm 23, the other end being fastened to the frame 3 by a suitable screw 26. A stop-pin 27 secured to the frame limits the movement of the arm 23 while under tension of the spring 25.

of said detent and throws it intothe path of the stop-lug 17, so as to stop the motion of the cylinder. The operator then moves the handle backward slightly and releases the lug 17 from contact with the arm 23, the

spring 25 then draws said arm downwardly against the stop-pin 27 to release the rear stop-lug 17 for further rotation, and at the same time the arm 22 of the detent is ele vated, so as to contact with the rear of the front stop-lug 16 and limit the reverse movement of the cylinder in the manner villustrated in Figure 3. The position'of the handle and lugs, therefore, determines the position of the cylinder when the work sheet is introduced, and in co-operation with a pressure-roller 28 which serves as a leading-edge gage and determines the depth of the margin which will be formed at the top of the printed sheet.

The depth of this margin is equal to the space between the handle and the top of the stencil, and may be readily varied by adjusting the handle around the cylinder rim.

In order to release the stencil-sheet from the cylinder, it may be desirable, when the parts are in the posit-ion shown in Figure '3, to move the handle further in a'reverse direction, that is, to the left as viewed in this figure. To accomplish this, the operator lifts thefinger-piece 24 on the bell-crank and withdraws the arm 22 from the path of the lug 16, thus freeing the cylinder for reverse movement.

The location of the finger-piece 24 may be such as to facilitate its manipulation. At the proper time for moving it, it may be immediately below the handle 9, as shown'in Figure 3, and within reach of the fingers of the hand grasping the handle.

Thus it will be seen that the construction described herein, provides an exceedingly simple method of attaining the results desired, the mechanism including only a few inexpensive working parts.

Variations may be resorted to within the scope of theinvention, and portionsvof the improvements may be used without others.

Having thus described my invention, I claim:

1. In a stenciling machine, the combination of a main frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylind r for rotatingthe same, a forward stop and a reverse stop on said cylinder, a forward check and a reverse check rigid with each other and pivotally mounted on said main frame, said reverse stop being engageable with said reverse check to move said forward check into the path of said forward stop and interrupt the forward movement of said cylinder, and means operative on slight reverse movement of said cylinder to move said forward check out of the path of said forward stop and to interpose said reverse check in the path of said reverse stop, thus stopping the reverse movement of said cylinder but permitting further forward movement thereof. r

2, In a stcnciliugmachine, the combination of a main frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylinder for rotating the same, aforward stop and a reverse stop on said cylinder. a forward check and a reverse check rigid with each other and pivotally mounted on said main frame, said reverse stop being engageable with said reverse check to move said forward check into the pathof said forward stop and interruptthe forward movement ofsaid cylinder, resilient means operative on slight reverse movement of said cylinder-to move said forward check out of the path of said forward stop and to interpose said reverse checkin the path of said reverse stop, and a stationary stop-member for stopping the, movement of said reverse check when it is interposed in the path of said reverse stop.

In a stenciling machine, the combination of a main frame, a stencil-cylinder mounted for rotationthereon, a forward stop and a reverse stop on said cylinder, a handle for rotating said. cylinder mounted on said cylinder between said stops, a forward, check and a reverse check rigid with each other and pivotallymounted on said main frame, said reverse stop being engageable with said reverse check to move said forward check into the path of said, forward stop and interrupt the forward movement of said cylinder, and means operative on slight reverse movement of said cylinder to move said forward check out of the path of said forward stop and to interpose said reverse check in the path of said reverse stop, thus stopping the reverse movement of said cylinder but permitting further for ward movement thereof.

,4. In a stenciling machine, the combination with a rotary stencil-cylinder and means for gaging the leading edges of the copysheets to pass around said cylinder, of a back-stop gage on said cylinder, a stop movable on the framework and cooperative with said back-stop gage and said leading-edge gage to secure the correct relative positioning between the stencil-cylinder and the copy-sheet, a cam following said back-stop and moving said movable stop aside as the 1 cylinder advances at the copying operation. said movable stop'being also passed by said back-stop at the end of the cylinder revolution, a check provided upon said movable stop, a forward stopupon said cylinder into the path of which said check is;moved by the coaction of said backstop and said check, arresting the cylinder, and means effective upon the release of the cylinder from forward pressure, for moving the movable stop into the path of the back stop, locating the cylinder for the next copy-sheet.

5.'In a stenciling machine, the combination of a frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylinder for rotating the same, means for stopping the forward rotation of'said cylinder at a predetermined point, said means being releasable on slight reverse movement of said sylinder, means operable on therelease of the first-mentioned means to limit the reverse movement of said cylinder, and manually-operable means for releasing the second-mentioned means to permit further reverse n'iovemen't of said cylinder.

6 In a stenciling machine, the combination of a frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylinder for rotating the same, means for st0pping the forward rotation of said cylinder at a predetermined point, said means being releasable on slight reverse movement of said cylinder, means operable on the release of the first-mentioned means to limit the reverse movement of said cylinder, and means actuable by the hand of an operator as it grasps said handle to release the secondmentioned means and permit further reverse movement of said cylinder.

7. In a stenciling machine, the combination of a frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylinder for rotating the same, means for stopping the forward rotation of said cylinder at a predetermined point, said means being releasable on slight reverse movement of said cylinder, means operable on the release of the first-mentioned means to limit the reverse movement of said cylinder, and manually-operable means for releasing the second-mentioned means to permit further reverse movement of said cylinder, said manually-operable means being spaced from said handle to permit access thereto for effecting the release of said second-mentioned means. a

8. In a stenciling machine, the combination of a frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylinder for rotating the same, a forward stopmember and a reverse stop-member on said cylinder, a bell-crank movable on said frame and having a reverse stop-portion, co-operative with said reverse stop-member, and a forward check-portion co-operative with said forward stop-member, said reverse stopportion being actuable on the engagement of said reverse stop-member therewith, in the forward rotation of said cylinder, to move said forward check-portion into engagement with said forward stop-member, and means for withdrawing said forward check-portion from engagement with said forward stop-member on the movement of said cylinder in reverse direction by an operator with drawing said forward stop-member,

and for simultaneously moving said. reverse stop-portion into the path of said reverse stop-member for limiting the reverse move ment of said cylinder, said bell-crank being spaced radially away from said handle when said reverse stop-portion is in engagement with said back stop-member, to permit ready access to said bell-crank for manual actuation thereof, to withdraw said reverse stopportion from engagement with said back stop-member and permit further reverse movement of said cylinder;

9. In a stenciling machine, the combination of a frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylinder rotating the same, a forward stopmember and a reverse stop-member on said cylinder, a bell-crank movable on said frame and having a reverse stop-portion co-operativewith said reverse stop-member, and a forward check-portion co-operative with said forward stop-member, said reverse stopportion being actuable on the engagement of said reverse stop-member therewith, in the forward rotation of said cylinder, to move said forward check-portion into engagement with said forward stop-member. and a spring acting on'said bell-crank for forward check-portion from engagement with said forward stopmember on the movement of said cylinder in reverse direction by an operator and for simultaneously moving said reverse stopportion into the path of said reverse stopmember for limiting the reverse movement of said cylinder, said bell-crank being spaced radially away from said handle when said reverse stop-portion is in engagement with said back stop-member, to permit ready access to said bell-crank for manual actuation thereof, to withdraw said reverse stop-portion from engagement with said back stop-' member and permit further reverse move" ment of said cylinder.

10. In a stenciling machine, the combination of a frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylinder for rotating the same, a forward stopmember and a reverse stop-member on said cylinder, a bell-crank movable on said frame and having a reverse stop-portion, co-0pera-- tive with said reverse stop-member, and a forward check-portion cooperative with said said reverse stopportion being actuable on the engagement of said reverse stop-member therewith, in the forward rotation of said cylinder, to move said forward check-portion into engagement with said forward stop-member, means for withdrawing said forward checkportion from engagement with said forward stopimember on the movement of said cylinder in reverse direction by an operator and for simultaneously moving said reverse stop-portion into the path of said reverse stop-member for limiting the reverse movement of said cylinder, and a finger-piece on said bell-crank, which is adjacent said handle when said reverse stop-portion is in engagement with said back stop-member and is movable by the operator to Withdraw said reverse stop-portion from engagement with said back stop-member and permit further reverse movement of said cylinder.

11. In a .stenciling machine, the combination of a frame, a stencil-cylinder mounted for rotation thereon, a handle on said cylinder for rotating the same, a forward stopmember and a reverse stop-member on said cylinder, a reverse stop-dog co-operative with said reverse stop-member, a forward stop-dog co-operative with said forward stop-member, said reverse stop-member being engage/able with said reverse stop-dog in the forward rotation of said cylinder, and

means operative on said engagement to move said forward stop-dog intoengagement with said forward stop-member means for withdrawing said forward stop-dog from engagement with said forward stopmember on the movement of said cylinder in reverse direction by an operator, the firstmentioned means being operative as said forward stop-dog is thus withdrawn tofsimultaneously move said reverse stop-dog into the path of said reverse stop-mel'nber, and

a lingerpiece on said forward stop-dog for the manual movement thereof, said firstmentioned means being actuable by movement of said forward stop-dog to withdraw said reverse stop-dog from engagement with said reverse stop-member and permit further reverse movement of said cylinder by the opeator.

JAMES E. SHAVER, JR. 

